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a2f2577d96
The purpose of torture_runnable is to allow rcutorture and locktorture to be started and stopped via sysfs when they are built into the kernel (as in not compiled as loadable modules). However, the 0444 permissions for both instances of torture_runnable prevent this use case from ever being put into practice. Given that there have been no complaints about this deficiency, it is reasonable to conclude that no one actually makes use of this sysfs capability. The perf_runnable module parameter for rcuperf is in the same situation. This commit therefore removes both torture_runnable instances as well as perf_runnable. Reported-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
106 lines
3.7 KiB
C
106 lines
3.7 KiB
C
/*
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* Common functions for in-kernel torture tests.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you can access it online at
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* http://www.gnu.org/licenses/gpl-2.0.html.
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*
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* Copyright IBM Corporation, 2014
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*
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* Author: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
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*/
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#ifndef __LINUX_TORTURE_H
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#define __LINUX_TORTURE_H
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#include <linux/types.h>
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#include <linux/cache.h>
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#include <linux/spinlock.h>
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#include <linux/threads.h>
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#include <linux/cpumask.h>
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#include <linux/seqlock.h>
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#include <linux/lockdep.h>
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#include <linux/completion.h>
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#include <linux/debugobjects.h>
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#include <linux/bug.h>
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#include <linux/compiler.h>
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/* Definitions for a non-string torture-test module parameter. */
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#define torture_param(type, name, init, msg) \
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static type name = init; \
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module_param(name, type, 0444); \
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MODULE_PARM_DESC(name, msg);
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#define TORTURE_FLAG "-torture:"
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#define TOROUT_STRING(s) \
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pr_alert("%s" TORTURE_FLAG " %s\n", torture_type, s)
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#define VERBOSE_TOROUT_STRING(s) \
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do { if (verbose) pr_alert("%s" TORTURE_FLAG " %s\n", torture_type, s); } while (0)
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#define VERBOSE_TOROUT_ERRSTRING(s) \
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do { if (verbose) pr_alert("%s" TORTURE_FLAG "!!! %s\n", torture_type, s); } while (0)
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/* Definitions for online/offline exerciser. */
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bool torture_offline(int cpu, long *n_onl_attempts, long *n_onl_successes,
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unsigned long *sum_offl, int *min_onl, int *max_onl);
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bool torture_online(int cpu, long *n_onl_attempts, long *n_onl_successes,
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unsigned long *sum_onl, int *min_onl, int *max_onl);
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int torture_onoff_init(long ooholdoff, long oointerval);
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void torture_onoff_stats(void);
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bool torture_onoff_failures(void);
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/* Low-rider random number generator. */
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struct torture_random_state {
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unsigned long trs_state;
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long trs_count;
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};
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#define DEFINE_TORTURE_RANDOM(name) struct torture_random_state name = { 0, 0 }
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unsigned long torture_random(struct torture_random_state *trsp);
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/* Task shuffler, which causes CPUs to occasionally go idle. */
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void torture_shuffle_task_register(struct task_struct *tp);
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int torture_shuffle_init(long shuffint);
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/* Test auto-shutdown handling. */
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void torture_shutdown_absorb(const char *title);
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int torture_shutdown_init(int ssecs, void (*cleanup)(void));
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/* Task stuttering, which forces load/no-load transitions. */
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void stutter_wait(const char *title);
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int torture_stutter_init(int s);
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/* Initialization and cleanup. */
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bool torture_init_begin(char *ttype, bool v);
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void torture_init_end(void);
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bool torture_cleanup_begin(void);
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void torture_cleanup_end(void);
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bool torture_must_stop(void);
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bool torture_must_stop_irq(void);
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void torture_kthread_stopping(char *title);
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int _torture_create_kthread(int (*fn)(void *arg), void *arg, char *s, char *m,
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char *f, struct task_struct **tp);
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void _torture_stop_kthread(char *m, struct task_struct **tp);
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#define torture_create_kthread(n, arg, tp) \
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_torture_create_kthread(n, (arg), #n, "Creating " #n " task", \
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"Failed to create " #n, &(tp))
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#define torture_stop_kthread(n, tp) \
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_torture_stop_kthread("Stopping " #n " task", &(tp))
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#ifdef CONFIG_PREEMPT
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#define torture_preempt_schedule() preempt_schedule()
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#else
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#define torture_preempt_schedule()
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#endif
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#endif /* __LINUX_TORTURE_H */
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